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Finding the Fourth Proportional to 101,430.84, 151,883.82 and 90,146.28

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Solution

The fourth proportional to 101,430.84, 151,883.82 and 90,146.28 is: 134,986.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,430.84 : 151,883.82 = 90,146.28 : x
  2. Step 2: Convert to fraction form
    101,430.84/151,883.82 = 90,146.28/x
  3. Step 3: Cross multiply
    101,430.84x = 151,883.82 × 90,146.28
  4. Step 4: Simplify right side
    101,430.84x = 13,691,761,365.19
  5. Step 5: Solve for x
    x = 13,691,761,365.19/101,430.84
  6. Step 6: Final answer
    x = 134,986.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.